KR100448504B1 - Transfer press with means for preventing a panel for a vehicle from bending - Google Patents

Abstract

The present invention relates to a transfer press having a panel preventing means, the upper die (10) which is installed on the base but the upper die block 12 is mounted on one side lower surface; A lower die 20 installed in the base in correspondence with the upper die 10; A blank holder 40 having a cushion pin 50 mounted on a lower surface thereof, and having a stepped surface 42 formed at a portion corresponding to the upper block 12; A feed bar 80 having a finger 82 provided to enter the step surface 42 to convey the completed panel 30; During the drawing process, the top block 12 and one end of the panel 30 are in close contact with each other while the other end of the blank holder 40 supports the lower surface of the panel 30 to remove wrinkles or wrinkles of the die face. By including the panel bending prevention means 70 provided in the finger entry space 90 above the step surface 42, while supporting the lower surface of the panel from the beginning of the molding process to eliminate the disadvantage of bending one end of the panel In order to prevent wrinkles on the die face, it is possible to remove interference when entering the finger of the panel where the molding is completed, thereby improving the press operation rate.

Description

Transfer press with means for preventing a panel for a vehicle from bending}

The present invention relates to a transfer press having a panel bending preventing means.

Particularly, the present invention can improve the quality of the press while improving the quality of the press while preventing the edge portion of the panel from being bent or wrinkles in the die face during the transfer of the panel by the finger during the molding process of the body panel. It relates to a transfer press provided with a panel break prevention means so that the finger entry space portion of the blank holder.

More than 80% of the panel production line of the vehicle body is composed of a transfer press. The transfer press is composed of the upper and lower dies 1 and 2 and the lower blank holder 4 as shown in FIGS. It is composed.

In order to produce the finished panel, at least four or more press molds are required, and each process transfer means of the transfer press is performed by the fingers 9 of the feed bar 8. Here, the finger 9 grasps (lifts) the body panel 3 and moves to the next process to seat the body panel 3 at the working position of the upper die 1 and the lower die 2 and then returns to the original position. At this time, the vehicle body panel 3 is draw-molded by the dies 1 and 2.

Here, referring to the operation relationship of the transfer press according to the prior art, the body panel 3 is driven by the finger 9 of the feed bar 8 in the state where the upper die 1 is raised and the blank holder 4 is raised. When the upper die 1 is lowered, the body panel 3 is in contact with the blank holder 4 to maintain the holding state of the body panel 3. Subsequently, when the upper die 1 is lowered, the vehicle body panel 3 is lowered together with the blank holder 4 to complete the molding process. Then, as the upper die 1 and the blank holder 4 ascend, the molded body panel 3 is separated from the lower die 2, and then the finger 9 of the feed bar 8 is removed from the blank holder. It enters the finger entry space 6 formed in the upper surface of (4) and transfers the body panel 3, which has been molded, to the next process. Here, reference numeral "5" is a cushion pin.

Here, the transfer press of the prior art does not control the body panel (3) from the beginning of molding as well as after the completion of molding because the finger entry space portion (6) of the blank holder (4) is present when holding the body panel (3) As shown in FIG. 5, there is a problem in that the edge portion of the body panel 3 is bent or wrinkles are generated in the die face portion. In addition, the finger entry space 6 is narrowed by the bending of the body panel 3, so when the finger 9 enters the body panel 3 or the blank holder 4, the bottom surface of the relief interferes and the production line is frequently stopped. It was causing serious problems.

An object of the present invention created to solve the above problems is to prevent the occurrence of wrinkles in the edge portion of the panel or the die face portion during the transfer of the panel by the finger during the molding process of the body panel to improve the quality It is an object of the present invention to provide a transfer press including a panel break prevention means capable of improving the press operation rate.

In addition, another object of the present invention is to provide a panel break prevention means in the finger entry space existing on the upper surface of the blank holder to support the lower surface of the relief of the blank holder so that the body panel is not bent from the beginning of forming the body panel. The present invention provides a transfer press having a panel anti-twist means.

An object of the present invention, the upper die is installed on the base, but the upper die is mounted on one side lower surface; A lower die installed in the base in correspondence with the upper die; A blank holder having a cushion pin mounted on a lower surface thereof and having a stepped surface formed at a portion corresponding to the upper block; A feed bar having a finger provided to enter the step surface and to convey the completed panel; Panel bending provided on the upper part of the stepped surface of the blank holder so that one end of the panel is in close contact with the top block and one end of the panel is in contact with the drawing process to eliminate wrinkles of the panel or die face. It can be achieved by a transfer press having a panel preventive means characterized in that it comprises a prevention means.

In addition, the panel bending preventing means of the present invention is the body portion coupled to the upper surface of the blank holder, and extending vertically from the upper surface of the body portion, the longitudinally incision in the longitudinal direction, the other end is in close contact with the upper block Is preferably configured to include a panel bending prevention member hinged to the cut portion of the holding portion to support the lower side of the panel.

1 is a schematic view showing a transfer press according to the prior art.

2 to 4 are cross-sectional views showing a process of cutting the vehicle body panel taken along the line II-II of FIG.

FIG. 5 is a perspective view illustrating a vehicle body panel in which defects are generated when molding is completed by a transfer press of the related art.

Figure 6 is a schematic view showing a transfer press provided with a panel bending preventing means according to the present invention.

7 and 8 are cross-sectional views showing a machining process of the vehicle body panel cut along the VI-VI line of FIG.

9 is a perspective view showing the panel break prevention means.

<< Explanation of symbols for main part of drawing >>

10: upper die die 12: upper die block

20: die die 30: panel

40: blank holder 42: step surface

50: cushion pin 70: panel bending prevention means

80: feed bar 82: finger

90: finger entry space

Hereinafter, the configuration of the present invention with reference to the drawings in detail.

FIG. 6 is a schematic view showing a transfer press including a panel bending preventing device according to the present invention, and FIGS. 7 and 8 are cross-sectional views showing a process of cutting a vehicle body panel along a line VI-VI of FIG. 6.

6 to 8, the transfer press including the panel bending preventing means according to the present invention has an upper mold in which the upper mold block 12 is mounted at a position corresponding to the finger entry space 90 of the blank holder 40. The die 10, the lower die 20, and the lower edge of the body panel 30 are supported in response to the lowering of the upper die 10 during the drawing process, so that the bending or die face portions of the body panel 30 are supported. It comprises a blank holder 40 having a panel break prevention means 70 in the finger entry space 90 to prevent wrinkles and the like.

Here, as shown in FIG. 9, the panel bending preventing means 70 includes a body portion 72 coupled to an upper surface of the finger entry space portion 90 of the blank holder 40, and the body portion 72. Mounted at right angles to the upper surface of the holding portion 74 is cut in the interior, and a portion of the holding portion 74 is built in the hinge portion of the panel bending prevention member 76 is hinged.

The body portion 72 has a rectangular shape in which a plurality of fastening holes 72a are formed to be coupled to the finger entry space portion 90 by fastening means such as bolts, and the support portion 74 has a feed bar from an upper surface to a lower predetermined portion. It is a cylindrical shape cut in the direction in which the finger 90 of 80 is entered. In addition, the panel bending preventing member 76 is fastened to be rotatable by the bolt 75 by inserting a part into the cutout portion of the above-described post portion 74. Here, reference numeral "50" is a cushion pin, "75a" is a fixing pin. In particular, the panel bending preventing member 76 of the present invention is smoothly rounded at one end for supporting the lower surface of the edge portion of the vehicle body panel 30. Therefore, as the upper block 12 presses the other end of the panel bending preventing member 76 in response to the lowering of the upper die 10, one end is rotated and raised relative to the hinge point, and thus the edge of the body panel 30 is increased. Since the lower surface of the portion is supported, bending of the body panel, wrinkles of the die face portion, etc. generated by the prior art do not occur.

Referring to the operation relationship of the transfer press provided with the panel bending preventing means of the present invention, as shown in Figure 6, the body panel 30 is transferred by the finger 90 of the feed bar 80, the die ( 10) 20 is seated on the side. At this time, the upper body die 10 and the blank holder 40, as shown in Figure 7, the body panel 30 is put in a state in which the blank holder 40 is raised. Thereafter, the lower surface of the upper die block 12 and the other end of the panel break prevention member 76 are in close contact with each other when the upper die 10 is lowered, so that one end of the panel break prevention member 76 is hinged based on the hinge point. As shown in FIG. 8, as shown in FIG. 8, the lower surface of the edge portion of the vehicle body panel 30 is supported (supported) in an upward direction to solve the disadvantage of the prior art. Since the process is the same as the process according to the prior art, the detailed description will be omitted.

Although the present invention described above is limited to one embodiment, the present invention is not limited thereto, and the present invention may be easily modified by those skilled in the art. It is obvious that it belongs to the technical idea.

The present invention having the above configuration has the following advantages and effects.

First, since the present invention supports the lower surface of the edge of the body panel until the molding process is completed, it is possible to fundamentally prevent the wrinkles or wrinkles of the die face portion generated at the edge of the body panel after the molding process is completed.

Second, the present invention prevents the conventional problems to implement the body panel quality improvement, as well as prevent the interference caused during the transfer of the body panel of the finger by installing the panel bending prevention means that was frequently made during the body panel production It provides the convenience of operation that does not require finger correction.

As a result, the present invention has the effect of improving the productivity of the operation by reducing the operation rate of the transfer press by solving all the conventional problems, and reduce the cost.

Claims (2)

An upper die (10) installed on the base but having an upper die block (12) mounted on one lower surface thereof; A lower die 20 installed in the base in correspondence with the upper die 10; A blank holder 40 having a cushion pin 50 mounted on a lower surface thereof, and having a stepped surface 42 formed at a portion corresponding to the upper block 12; A feed bar (80) having a finger (82) provided to enter the step surface (42) to convey the completed panel (30); During the drawing process to remove the bending of the panel 30 or the wrinkles of the die face portion, the blank holder 12 is in close contact with the upper block 12 and at the same time the other end of the blank holder to support one lower surface of the panel 30. And a panel break prevention means (70) provided in the finger entry space (90) above the step surface (42). The method of claim 1, The panel bending preventing means 70 is a body portion 72 coupled to the upper surface of the blank holder 40, and a vertically inclined post portion extending vertically from the upper surface of the body portion 72; (74) and one end is in close contact with the upper block 12, the other end is inserted into the cut portion of the support portion 74 to support the lower side of the one side of the panel 30 to prevent the hinged panel bent. The transfer press provided with the panel bending prevention means characterized by including the member 76.